From known source
Dealabs user blllbil-kun - whose leaks of the PS Plus line-ups from September to December were 100 per cent accurate - has now revealed the January 2022 games:
Deep Rock Galactic (PS4/PS5)
Dirt 5 (PS5/PS4)
Persona 5 Strikers (PS4)
The games, says billbil-kun will available from January 4, 2022.